A waste heat recovery type hot-water boiler device in a bathroom comprises a boiler, an absorption type heat pump set, a sewage heat exchanger, a tap water preheater, a heat storage water tank, a sewaA waste heat recovery type hot-water boiler device in a bathroom comprises a boiler, an absorption type heat pump set, a sewage heat exchanger, a tap water preheater, a heat storage water tank, a sewary energy sources, avoids wasting high-grade electric energy, is suitable for places needing hot bath water, such as hotels, schools, gymnasiums, hamams, and the like and belongs to the technical fimary energy sources, avoids wasting high-grade electric energy, is suitable for places needing hot bath water, such as hotels, schools, gymnasiums, hamams, and the like and belongs to the technical field of energy sources.eld of energy sources.ge pool, a sewage filter, a water-feeding pump, a sewage pump, a circulating water pump and a boiler backwater pump. Water from a tap water pipeline is divided into two paths, wherein one path is normge pool, a sewage filter, a water-feeding pump, a sewage pump, a circulating water pump and a boiler backwater pump. Water from a tap water pipeline is divided into two paths, wherein one path is normally supplied to the bathroom, and after being heated by the tap water preheater and the absorption type heat pump set, the other path is supplied as bath hot water; waste bath water collected by theally supplied to the bathroom, and after being heated by the tap water preheater and the absorption type heat pump set, the other path is supplied as bath hot water; waste bath water collected by thesewage pool is discharged after heat exchange by the sewage heat exchanger; and circulating water in a water ring exchanges heat with the sewage in the sewage [heat] exchanger and flows through the tasewage pool is discharged after heat exchange by the sewage heat exchanger; and circulating water in a water ring exchanges heat with the sewage in the sewage [heat] exchanger and flows through the tap water preheater and the absorption type heat pump set to exchange heat. The invention sufficiently utilizes the waste heat of waste bath water, reduces the fuel consumption, effectively utilizes prip water preheater and the absorption type heat pump set to exchange heat. The invention sufficiently utilizes the waste heat of waste bath water, reduces the fuel consumption, effectively utilizes prima